Two men charged in the fatal shooting of a teen-aged boy outside a high school basketball game at Chicago State University were ordered held without bail today.

Michael McNabb, 32, of Chicago, and Stephen Gilbert, 29, of Alsip, were each charged with first-degree murder Friday night in the Wednesday night slaying of 17-year-old Tyrone Lawson, officials said. McNabb and Gilbert might be related, police said. They appeared in bond court this morning, and their next hearing is set for Jan. 22.

The shooting happened outdoors, just outside the CSU gymnasium near 95th Street and King Drive, about 9:20 p.m. Wednesday after Simeon High School defeated Morgan Park. Lawson, a student at Morgan Park, was pronounced dead at Advocate Christ Medical Center in Oak Lawn.

Lawson, of the 11600 block of South Peoria Street, died from multiple gunshot wounds in a homicide, the Cook County medical examiner’s office determined Thursday afternoon. Lawson was shot twice in the back while running away, said Kurtistein Bailey, his 41-year-old aunt. Amid the chaos, someone knelt down and told Lawson to get up but he couldn't move, his aunt said.

University Police put out a quick message to nearby officers, asking them to watch for a Jeep, which was pulled over east of the campus a short time later, Chicago police have said.

Chicago police officers assigned to the South Chicago District brought McNabb and Gilbert into custody after they were riding in the Jeep, and police found a gun inside the vehicle, police have said.

According to prosecutors in bond court this morning, there was some gunpowder residue on Gilbert's left hand when he was arrested, and shells found at the scene matched with the gun found in the red Jeep that was being driven by McNabb.

An argument in a handshake line after the game preceded the shooting, though it's not clear whether the two were related. Each team was held for longer than normal in the locker rooms after the game. Nothing outside ordinary bumps and physical contact happened during the game.

This past fall, a football game between the two schools was postponed in the third quarter when a fight broke out in the stands. Authorities said a person was stabbed during the incident.

McNabb and Gilbert appeared for the bond hearing Saturday at the George Leighton Criminal Court Building.